Android长时间的事件
我有两个button，增加和减less一个按每个按一个，他们工作得很好，onClickListener。 我看到一个onLongClickListener存在，我假设是用于触摸和保持事件。 如果button被保持，我怎么会快速增加/减less数字？
我是否认为onLongClickListener每长按一次只会触发一次？ 有没有更合适的听众或财产的地方，我不知道？
您可以按照下面的代码来实现它。
package org.me.rapidchange; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnKeyListener; import android.view.View.OnTouchListener; import android.widget.Button; import android.widget.TextView; import java.util.concurrent.Executors; import java.util.concurrent.ScheduledExecutorService; import java.util.concurrent.TimeUnit; public class MainActivity extends Activity implements OnKeyListener, OnTouchListener, OnClickListener { private class UpdateCounterTask implements Runnable { private boolean mInc; public UpdateCounterTask(boolean inc) { mInc = inc; } public void run() { if (mInc) { mHandler.sendEmptyMessage(MSG_INC); } else { mHandler.sendEmptyMessage(MSG_DEC); } } } private static final int MSG_INC = 0; private static final int MSG_DEC = 1; private Button mIncButton; private Button mDecButton; private TextView mText; private int mCounter; private Handler mHandler; private ScheduledExecutorService mUpdater; /** Called when the activity is first created. */ @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_INC: inc(); return; case MSG_DEC: dec(); return; } super.handleMessage(msg); } }; mIncButton = (Button) findViewById(R.id.inc_button); mDecButton = (Button) findViewById(R.id.dec_button); mText = (TextView) findViewById(R.id.text); mIncButton.setOnTouchListener(this); mIncButton.setOnKeyListener(this); mIncButton.setOnClickListener(this); mDecButton.setOnTouchListener(this); mDecButton.setOnKeyListener(this); mDecButton.setOnClickListener(this); } private void inc() { mCounter++; mText.setText(Integer.toString(mCounter)); } private void dec() { mCounter--; mText.setText(Integer.toString(mCounter)); } private void startUpdating(boolean inc) { if (mUpdater != null) { Log.e(getClass().getSimpleName(), "Another executor is still active"); return; } mUpdater = Executors.newSingleThreadScheduledExecutor(); mUpdater.scheduleAtFixedRate(new UpdateCounterTask(inc), 200, 200, TimeUnit.MILLISECONDS); } private void stopUpdating() { mUpdater.shutdownNow(); mUpdater = null; } public void onClick(View v) { if (mUpdater == null) { if (v == mIncButton) { inc(); } else { dec(); } } } public boolean onKey(View v, int keyCode, KeyEvent event) { boolean isKeyOfInterest = keyCode == KeyEvent.KEYCODE_DPAD_CENTER || keyCode == KeyEvent.KEYCODE_ENTER; boolean isReleased = event.getAction() == KeyEvent.ACTION_UP; boolean isPressed = event.getAction() == KeyEvent.ACTION_DOWN && event.getAction() != KeyEvent.ACTION_MULTIPLE; if (isKeyOfInterest && isReleased) { stopUpdating(); } else if (isKeyOfInterest && isPressed) { startUpdating(v == mIncButton); } return false; } public boolean onTouch(View v, MotionEvent event) { boolean isReleased = event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL; boolean isPressed = event.getAction() == MotionEvent.ACTION_DOWN; if (isReleased) { stopUpdating(); } else if (isPressed) { startUpdating(v == mIncButton); } return false; } } 我有这个相同的目标，最终使用OnLongClick来捕获下来的部分，通过处理程序启动重复事件，然后正常的OnClick捕获释放，并停止它。 为我工作得很漂亮。
mOngoingRunnable = new Runnable() { public void run() { // do stuff mHandler.postDelayed(mOngoingRunnable, delayMsecs); } }; public boolean onLongClick(View view) { mHandler.post(mOngoingRunnable); mOngoing = true; return false; } public void onClick(View view) { if (mOngoing) { mHandler.removeCallbacks(mOngoingRunnable); mOngoing = false; } }
